You can set accommodations for individual students. You can exempt students from assessment due dates or time limits. Use accommodations to help students progress in the course even though they may have difficulty with some requirements.
When special circumstances arise, you may allow an exception on a specific test or assignment to an individual student. An exception includes additional attempts or extended access, even if the assessment is hidden from other students. An exception overrides the two settings applied to everyone else for that specific assessment only. Students don't see the exceptions you've added. You might use exceptions for students who have internet issues, disabilities, or technology and language differences.
Setting exceptions for your students, such as: multiple attempts, show course work/exam after due date. Note this is different than accommodations.
Unsubmitted work counts as zero is an Ultra feature and is currently available. Additional capabilities are planned for inclusion in Ultra Courses. See link below for more details.